been having very strong BH for 2 hours and due to go on holiday in 2 hours........should i ignore or cancel?

I'm 33 weeks today with 4th baby and have been having strong BH all morning, I have been sick as some are quiet painfuldue to go on holiday at 12 and DC are really excited, should i ring the hospital or just ignore them ? do they get stronger with each baby you have? I just dont know what to do!